ISTANBUL, TURKEY - MAY 01: Grigor Dimitrov of Bulgaria returns the ball to Diego Scwartzman of Argentina during the men's single match between Grigor Dimitrov and Diego Scwartzman at the TEB BNP Paribas Istanbul Open tennis tournament at Koza World of Sports Arena in Istanbul, Turkey on May 01, 2016. (Photo by Salih Zeki Fazlioglu/Anadolu Agency/Getty Images)
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